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参数资料
| 型号： | KITMMA955XLEVM |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 7/26页 |
| 文件大小： | 0K |
| 描述： | KIT EVALUATION FOR MMA955XL |
| 标准包装： | 1 |
| 传感器类型： | 加速计，3 轴 |
| 传感范围： | ±2g，4g，8g |
| 接口： | I²C |
| 灵敏度： | 0.061mg/LSB，0.122mg/LSB，0.244mg/LSB |
| 嵌入式： | 否 |
| 已供物品： | 2 个板，线缆，文档 |
| 已用 IC / 零件： | MMA955XL |
3
3.1
General Description
Functional Overview
The MMA955xL device consists of a 3-axis, MEMS accelerometer and a mixed-signal ASIC with an integrated, 32-bit CPU. The
mixed-signal ASIC can be utilized to measure and condition the outputs of the MEMS accelerometer, internal temperature sensor,
or a differential analog signal from an external device.
The calibrated, measured sensor outputs can be read via the slave I 2 C or SPI port or utilized internally within the MMA955xL
platform.
Figure 1. Platform block diagram
A block level view is shown in the preceding figure and can be summarized at a high level as an analog/mixed-mode subsystem
associated with a digital engine:
? The analog subsystem is composed of:
– A 3-axis transducer that is an entirely passive block including the MEMS structures.
– An Analog Front End (AFE) with the following:
? A capacitance-to-voltage converter (CVC)
? An analog-to-digital converter
? A temperature sensor
? The digital subsystem is composed of:
– A 32-bit, ColdFire V1 CPU with a Background-Debug Module (BDM)
– Memory: RAM, ROM, and flash
– Rapid GPIO (RGPIO) port-control logic
– Timer functions include:
? Modulo timer module (MTIM16)
? Programmable Delay Timer (PDB)
MMA955xL
Sensors
Freescale Semiconductor, Inc.
7
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